Initial checkin of Pika from heckimp

tools/colorsvg2png.c

@@ -0,0 +1,88 @@
+/* colorsvg2png.c
+ * Copyright (C) 2018 Jehan
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <glib/gprintf.h>
+#include <librsvg/rsvg.h>
+
+int
+main (int argc, char **argv)
+{
+  GError            *error = NULL;
+  RsvgHandle        *handle;
+  cairo_surface_t   *surface;
+  cairo_t           *cr;
+  RsvgRectangle      target_rect;
+
+  gchar             *input;
+  gchar             *output;
+  gint               dim;
+  gint               retval = 0;
+
+  if (argc != 4)
+    {
+      g_fprintf (stderr, "Usage: colorsvg2png svg-image png-output size\n");
+      return 1;
+    }
+
+  input  = argv[1];
+  output = argv[2];
+  dim    = (gint) g_ascii_strtoull (argv[3], NULL, 10);
+  if (dim < 1)
+    {
+      g_fprintf (stderr, "Usage: invalid dimension %d\n", dim);
+      return 1;
+    }
+
+  handle = rsvg_handle_new_from_file (input, &error);
+  if (! handle)
+    {
+      g_fprintf (stderr,
+                 "Error: failed to load '%s' as SVG: %s\n",
+                 input, error->message);
+      g_error_free (error);
+      return 1;
+    }
+
+  surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, dim, dim);
+  cr = cairo_create (surface);
+
+  target_rect.x = target_rect.y = 0;
+  target_rect.width = target_rect.height = dim;
+
+  if (! rsvg_handle_render_document (handle, cr, &target_rect, NULL))
+    {
+      g_fprintf (stderr,
+                 "Error: failed to render '%s'\n",
+                 input);
+      retval = 1;
+    }
+
+  if (retval == 0 &&
+      cairo_surface_write_to_png (surface, output) != CAIRO_STATUS_SUCCESS)
+    {
+      g_fprintf (stderr,
+                 "Error: failed to write '%s'\n",
+                 output);
+      retval = 1;
+    }
+
+  cairo_surface_destroy (surface);
+  cairo_destroy (cr);
+  g_object_unref (handle);
+
+  return retval;
+}